Method of reenforcing the walls of packing cases



May 1, 1928. 7 1,667,793

A. MAUSER METHOD OF REENFORCING THE WALLS 0F PACKING CASES Filed June 9. 1924 Fig.1 7 1 Fig.2 i w d w a 0/ T '1 I '.F2;7.5 M .F'igfi IE/g5 Fi 6' Fig. 7 I Fi .0

jL-lllawrer w M W Patented May 1, 1928.

UNITED STATES Arrows MAUSER, or conoenn-nanrmmune, ERMANY.

METHOD OF REENFORCING THE WALLS OF PACKING CASES.

Application filed June 9, 1924, Serial No. 719,013, and in Germany June 18, 1923.

The stiffening of the walls of packing containers, for example barrels, drums and the like by encircling them with end hoops or running hoops is common practice. It is also known to increase the strength of the .walls by forming circumferential corrugations in the walls.

According to the presentinvention, the strength of the packing containers, for example casks, drums and the like, is increased by providing the walls of the container with ribs situated at short distances apart and consisting of circumferential folds formed in said walls, whereby belts of great strength are formed between the ribs which constitute' end hoops or running hoops.

The present method has considerable advantages in the manufacture of casks and drums, such as are universally employed for the transport and storage of liquids and dyes. These advantages consist inthis that the walls can be-made of material which is of less thickness than is usual without the strength of the wall being detrimentally affected. The reduction of weight of the cask obtained thereby, is moreover increased by the weight reduction due. to the absence of separate end hoops or running hoops made from section iron. In the case of the invention, owing to the absence of the above mentioned hoops, all hoop repairing which has hitherto been necessary owing to the hoops becoming loose due to deformation of the walls is avoided. The ribs consisting of circumferential folds surround the short belts of the walls in the manner of a frame, not only take up radial blows delivered to the walls and thereby prevent extensive dint ing of the latter but also smooth out pressure or blows acting on the container-in the direction of its longitudinal axis. In this manner the belts of the wall act as short lever arms which in conjunction with the folded ribs take up the pressure of the load with the final result that it is distributedover the circumference of the wall.

The invention is illustrated by way of example in the accompanying drawings in which:

Figures 1 and 2 show diagrammatically the behaviour of the wall of a container of a known construction and of a container made according to the present invention, respectively under the action of sudden compressive stresses, Flgure 3 shows a rib comprising a plurality of circumferential folds of equal depth. r

Figure 4: shows a similar construction. .to that shown in Figure 3 having outer'folds of greater depth than the inner folds.

Figure 5 shows a. constructional form of rib in which the outer folds are bent in wardly over the central portion of the rib.

Figures 6 to 8 show three constructional forms of V-shaped ribs,

Figure 9 shows a rib having outer circumferential folds enclosing a sinusoidal inner portion.

Figures 10 and 11 show endribs having an inwardly projecting seating for supporting. an end wall.

Figures w12and 13 show further modifications. i

Figure 1 shows a container wall a of a known construction with running hoops ,6

.made of section iron. If pressure is applied.

to the wall e in the direction of the arrow 0, this will cause bulging in of the wall to the extent indicated by the dottedline' f, as the wall is not strong enough throughout its length d to withstand the pressure. The

nearer the point of pressure lies to the running hoop the further will the inward bulge extend beyond the latter, and it willcause 'a 'lo0seningof the running hoop. In the case of a container wall stiffened by reen forcing ribs Z) according to the present invention, when a local pressure 0 of the same force is applied to the wall a, the inward bulge 7 will be far smaller, as willbe seen from FigureQ, as the belts d, d d have. a far greater strength owing to the reenforcing ribs 1) lying between them, which consist of circumferential. folds formed in the wall a.

The reeuforcing ribs are formed by grooving or corrugating the walls of the container and pressing the sides of the grooves together so as to form circumferential folds. Figure 3 shows a solid rib consisting of a plurality of folds of equal depth, while Figure 4 shows a similar construction in which the outer folds are of greaterdepththan the inner folds so as to project beyond. the lat ter. In the construction shown in Figure 5, the innermost groove is not pressed together and the outer folds which are of greater depth are bent over inwardly so as to form a hollow rectangular section rib. Figure 6 shows a hollow V-shaped rib in which the innermost groove is not pressed together, the outer folds extending slightly beyond the inner portion of the rib. Figure 7 shows a V-shaped rib consisting of a single inner fold with a V-shaped groove on either side thereof and Figure 8 shows a similar construction in which a )lurality of inner folds are provided. In Figures 6 to 8 is shown how, owing to the roof-shaped construction of the reenforcing ribs, sudden compression stresses, which hit the ribs perpendicularly, are transmitted in the direction of the arrows to the two adjacent belts (Z, d. The construction shown in Figure 9 is a modification of that shown in Figure 3, the inner grooves being pressed together so that the sides make contact with one another only at their ends. Figure 10 shows a reenforcing rib b of similar construction to that shown in Figure 7 intended to act as an end hoop, the inner fold it in the wall forming a. seat for the bottom 5/ of the container, the edge of which is flanged and reenforced by an inwardly extending circumferential rib formed from the edge of the bottom itself. The end of the container wall is bent over to form an inwardly extending circumferential rib, between the edge of which and the edge of the rib on the bottom g is formed a welding seam 9 which is protected within the bottom recess {1 In containers with a re movable lid, the fold 71 in the wall of the container acts as the seat for the lid. In Figure 11 a constructional form of reenforc ing rib is shown, in which the inner fo'lds '2' lying between the two outer folds of the rib extend partly within the packing container, which can be used in a similar n'ianner as the rib 72. of Fig. 10.

As shown in Figure 12 the inner folds 2' may be replaced by a hoop of truncated V- shaped cross-section inserted between the outer folds of the rib. Reenforcing ribs having a V-shaped or U-shaped cross-section may be supported by an internal reenforcing band it: engaging in the same, as shown in Figure 14.

In a modified form of the invention the reenforcing ribs in the wall of the container run longitudinally of the vessel or diagonally around the same.

\Vhat I claim is:

1. A packing container having circumferential reenforcing ribs extending completely round the periphery of the container so as to be capable of acting as end hoops or running hoops, each of said ribs comprising a group of Cll'CllIl'lfClCl'liltll grooves, the adjacent sides of which are prcsed together over the whole extent of the ribs, as set forth.

A packing container having circumferential reenforcing ribs extending completely round the periphery of the container so as to be capable of acting as end hoops or running hoops, each of said ribs comprising a group of circumferential grooves having the outer grooves of a dillerent depth than the inner grooves, the adjacent sides of said grooves being pressed together over the whole extent of the ribs, as set forth.

3. A packing container having circiunl'er ential recnl'orcing ribs extending completely round the periphery of the container so as to be capable of acting as end hoops or running hoops, and having their outer parts projecting beyond the periphery of the inner part of the ribs, each of said ribs comprising a group of circumferential grooves, the ad jacent sides of which are pressed together over the whole extent of the ribs, as set forth.

4. A packing container having reeinforcing ribs provided at short intervals apart on the walls of the said container, each of the said ribs comprising a plurality of circumferential folds formed in the said walls, with the outer folds bent over the inner portion of the ribs. as set forth.

A packing container having rccnl'orcing ribs provided at short intervals apart on the walls of the said container, each of said ribs comprising a plurality of circumferential folds formed in the said walls a rib being located on the walls of the container at each end thereof, each of said ribs comprising a circumferential seating projecting inwardly into the container, for supporting an end wall of the container, as set forth.

In testimony whereof I have signed my name to this specification.

ALFONS M A USER. 

